Sealing assembly

Abstract

A sealing assembly includes a first sealing member disposed on a fixed body and a second sealing member disposed on a rotating body while facing the first sealing member, such that when the second sealing member rotates, the first sealing member and the second sealing member work in conjunction with each other to generate flow of fluid in a reverse direction and form a fluid barrier, thereby preventing leakage of the fluid.

What is claimed is: 
     
       1. A sealing assembly, comprising:
 a first sealing member disposed on an inner circumferential surface of a fixed body; 
 a second sealing member disposed on an outer circumferential surface of a rotating body configured to rotate with respect to the first sealing member, the second sealing member including
 a sealing body part disposed on the outer circumferential surface of the rotating body, and 
 a tooth part disposed on the sealing body part and including a spiral, the spiral including a spiral segment having opposite ends offset from each other; and 
 
 a fluid barrier formed between the first sealing member and the second sealing member by transfer fluid flowing in a direction reverse to a direction of a fluid leak, 
 wherein the spiral includes a step portion connecting the opposite ends of the spiral segment, the step portion configured to push rotating fluid toward an introduction side of the leaked fluid to form the fluid barrier in a gap between the first sealing member and the second sealing member. 
 
     
     
       2. The sealing assembly of  claim 1 , wherein the step portion is connected to either of the opposite ends of the spiral segment at a predetermined angle. 
     
     
       3. The sealing assembly of  claim 1 , wherein the opposite ends of the spiral segment include a first end and a second end, the second end disposed closer to the introduction side of the leaked fluid than the first end, and wherein the pushed fluid travels along the spiral from the first end to the second end by passing over the step portion.